Francis b



@man :me @anni ffm,

. IMPROVEMENT IN SAWING SHINGLBS.

@ligt dgshnle maar tr in tiges: Netten atmt mav mating part m5 tige'tame.

TO ALL WHOM IT MAY CONCERN:

Beit known that I, FRANCIS B. Nonrnaor, of the city of Newark, in thecounty of Essex, and State of New Jersey, have made certain Improvementsin Machines forSawing at different angles through the same block; and Ido hereby declare the'following to be a full and exact description ofthe same, referencebeing herein had to the drawings that accompany thisspecification, and which make part of the same. v

The nature of my 'improvement consists in providing for motion, invaried inclinations, of' straight saws, in their passing through thesame block at'the same time.

In the-drawings, Figure I is a perspective view of a machine adapted tosawing shingles lengthwise from the block, the four saws cutting fourshingles at one time; and by having the gang of saws increased, thewhole block can be sawed into shingles in one passage 'by the saws.- Thepeculiar construction consists in the two or more gates to which thesaws are attachedbeing made to travel in rebates, or in grooves, as thecase may be, thatiare of differing inclinings or angles. A is one gatethat moves up and down onV the angle a, Figure 2, and B is another gate,moving on the angle 6, fig. 2; the one on the front of the posts C, andthe other on the back of the same posts, the angles being edgewise tothe gates. Figure 3 shows the top bars of the two gates A and B, thebottom bars being similar thereto.f Each of these bars has as manyprojections, c, as it is desired to have saws to cut on the peculiarangle to which that gate is inclined. To these projections the saws areaiixed in any convenient manner, the teeth ofthe saws on A being towardthe bar, and on B the backs of the saws are toward the bar;. thusV thecutting edges of the saws are brought to the same front line. `When thetwo bars, iig. 3, descend, the saws e and z move on the incline a, iig.2, and those marked d and h, on the angle b. The distance of the sawsfrom each other, at their ends, varying uniformly as the gates descendor ascend, each saw preserving its own line, blocks of timber or ofstone can be cut to any angle or bevel on one side, and straight on theother. An adaptation of the machine to the cutting of curved bevelledship timber can be made advantageously as to labor and economy ofmaterial. Any desirable feed motion can be attached to the carriage, andthe gates can be attached to the connecting-rod in any convenient way,admitting thel vibratory motionv of the gates, and the machine may bedriven by belt or gearing, as may be most convenient..

I do not claim sawing on an angle, but what I claim as my improvement,and desire to'secure by Letters Patent, is v- 1. Sawing a block of woodinto shingles, or other analogous things having alternate buts andpoints, by means of a gang of reciprocating saws, when arranged andoperated substantially as described.

2.v (Phe projections c, on the cross-bars of the two gates, when used incombination with the two reciprocating gates, having a gang of sawsoperating substantially as described.

v FRANCIS B. NORTHROP.

Witnesses:

W. M. GooDINe,

Sinner U. EDWARDS.

